MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  scutfo Structured version   Visualization version   GIF version

Theorem scutfo 27819
Description: The surreal cut function is onto. (Contributed by Scott Fenton, 23-Aug-2024.)
Assertion
Ref Expression
scutfo |s : <<s –onto No

Proof of Theorem scutfo
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 scutf 27723 . 2 |s : <<s ⟶ No
2 lltropt 27786 . . . . 5 ( L ‘𝑥) <<s ( R ‘𝑥)
3 df-br 5093 . . . . 5 (( L ‘𝑥) <<s ( R ‘𝑥) ↔ ⟨( L ‘𝑥), ( R ‘𝑥)⟩ ∈ <<s )
42, 3mpbi 230 . . . 4 ⟨( L ‘𝑥), ( R ‘𝑥)⟩ ∈ <<s
5 lrcut 27818 . . . . 5 (𝑥 No → (( L ‘𝑥) |s ( R ‘𝑥)) = 𝑥)
65eqcomd 2735 . . . 4 (𝑥 No 𝑥 = (( L ‘𝑥) |s ( R ‘𝑥)))
7 fveq2 6822 . . . . . 6 (𝑦 = ⟨( L ‘𝑥), ( R ‘𝑥)⟩ → ( |s ‘𝑦) = ( |s ‘⟨( L ‘𝑥), ( R ‘𝑥)⟩))
8 df-ov 7352 . . . . . 6 (( L ‘𝑥) |s ( R ‘𝑥)) = ( |s ‘⟨( L ‘𝑥), ( R ‘𝑥)⟩)
97, 8eqtr4di 2782 . . . . 5 (𝑦 = ⟨( L ‘𝑥), ( R ‘𝑥)⟩ → ( |s ‘𝑦) = (( L ‘𝑥) |s ( R ‘𝑥)))
109rspceeqv 3600 . . . 4 ((⟨( L ‘𝑥), ( R ‘𝑥)⟩ ∈ <<s ∧ 𝑥 = (( L ‘𝑥) |s ( R ‘𝑥))) → ∃𝑦 ∈ <<s 𝑥 = ( |s ‘𝑦))
114, 6, 10sylancr 587 . . 3 (𝑥 No → ∃𝑦 ∈ <<s 𝑥 = ( |s ‘𝑦))
1211rgen 3046 . 2 𝑥 No 𝑦 ∈ <<s 𝑥 = ( |s ‘𝑦)
13 dffo3 7036 . 2 ( |s : <<s –onto No ↔ ( |s : <<s ⟶ No ∧ ∀𝑥 No 𝑦 ∈ <<s 𝑥 = ( |s ‘𝑦)))
141, 12, 13mpbir2an 711 1 |s : <<s –onto No
Colors of variables: wff setvar class
Syntax hints:   = wceq 1540  wcel 2109  wral 3044  wrex 3053  cop 4583   class class class wbr 5092  wf 6478  ontowfo 6480  cfv 6482  (class class class)co 7349   No csur 27549   <<s csslt 27691   |s cscut 27693   L cleft 27755   R cright 27756
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5218  ax-sep 5235  ax-nul 5245  ax-pow 5304  ax-pr 5371  ax-un 7671
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-rmo 3343  df-reu 3344  df-rab 3395  df-v 3438  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-pss 3923  df-nul 4285  df-if 4477  df-pw 4553  df-sn 4578  df-pr 4580  df-tp 4582  df-op 4584  df-uni 4859  df-int 4897  df-iun 4943  df-br 5093  df-opab 5155  df-mpt 5174  df-tr 5200  df-id 5514  df-eprel 5519  df-po 5527  df-so 5528  df-fr 5572  df-we 5574  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-res 5631  df-ima 5632  df-pred 6249  df-ord 6310  df-on 6311  df-suc 6313  df-iota 6438  df-fun 6484  df-fn 6485  df-f 6486  df-f1 6487  df-fo 6488  df-f1o 6489  df-fv 6490  df-riota 7306  df-ov 7352  df-oprab 7353  df-mpo 7354  df-2nd 7925  df-frecs 8214  df-wrecs 8245  df-recs 8294  df-1o 8388  df-2o 8389  df-no 27552  df-slt 27553  df-bday 27554  df-sslt 27692  df-scut 27694  df-made 27757  df-old 27758  df-left 27760  df-right 27761
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator